Malicious PDF — malware analysis report

Static analysis result for SHA-256 f697f43b23e6c2b5…

MALICIOUS

PDF

79.0 KB Created: 2020-12-16 10:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0803162fd4663fccbd778485ffc9b6ff SHA-1: 16f544f45611e4bd6561a44409e3eda533c3c60e SHA-256: f697f43b23e6c2b5f5d10d6e76e03646e38c8bc83975edecf35b5eed137af135
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The primary URL, 'https://traffking.ru/strik?utm_term=that+time+i+got+reincarnated+as+a+slime+light+novel+pdf+volume+4', is likely a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/strik?utm_term=that+time+i+got+reincarnated+as+a+slime+light+novel+pdf+volume+4
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f9232b54d384.pdf
    • https://static.s123-cdn-static.com/uploads/4490129/normal_5fc6f072dd758.pdf
    • https://cdn-cms.f-static.net/uploads/4497697/normal_5fc1a04335056.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/8052197.pdf
    • https://cdn-cms.f-static.net/uploads/4462037/normal_5fd986fcefeb6.pdf
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5fba66d7ea6c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bufipevuril/justified_imdb_parents_guide.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee319ee0f32b87187404/1606282801945/13489230644.pdf
    • https://static1.squarespace.com/static/5fc653a7cd1e280355f935b8/t/5fc6ad3118e72e5fdbc40e5a/1606855988904/mountain_car_drive_2020_mod_apk_unlimited_money.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf677c173fb5383b9a8a19/1606379392155/basulekawitifa.pdf
    • https://static1.squarespace.com/static/5fc538cf40f1034a5cc52c8a/t/5fcd87419aa2de0c64abb4a0/1607305026085/ice_hockey_training_net.pdf
    • https://static1.squarespace.com/static/5fc0d7dc3dfdd95b60d4c91c/t/5fc4c8709b1ed03538739a3d/1606731889213/different_phylum_of_animalia.pdf
    • https://s3.amazonaws.com/xidulumexi/ridupanomaminogiz.pdf
    • https://static1.squarespace.com/static/5fc54343116eb00e3c68afb8/t/5fcabf6ca0fc71057d140ae6/1607122797039/planet_warming_topic_for_greta_thunberg.pdf
    • https://static1.squarespace.com/static/5fce03ef4a55824081a5361e/t/5fcffc297b0a801071fa3ca2/1607466025737/97248299321.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e733.bin
772cf1ab8e6a3161a7d8475a87acd0df74eafe2e99bdd6622e900999b1e29372		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 3312 bytes
font_01_sfnt_off0000f2fd.bin
b422ad285a5e04141f1cb34fa513ef7590b9889612957736d5e07a36190b24bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 5664 bytes
font_02_sfnt_off00010629.bin
92ef5a5a930f5ca1d1953412be448fcbc575d463dc90a23ab95bcc94e8f63e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 11952 bytes

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